WLK WESTLAKE CORP
NYSE · SEC CIK 1262823 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $10.19M 5 sales by 3 insiders
- Filings on record
- 282 since 2021-08-12, latest 2026-09-01 07:14
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| Chao Albert | Executive COB, Dir | — | $6.13M |
| Bender Mark Steven | EVP, CFO | — | $3.60M |
| Buesinger Robert F. | EVP, PEM Segment Head | — | $461.0K |
| Szwejbka Scott Thomas | SVP, HIP Segment Head | — | — |
| Holy Jeffrey Adam | VP, CAO | — | — |
| Chao Catherine T. | Dir | — | — |
| Sabat Carolyn Chao | Dir | — | — |
| Chao John Tsung-chen | Dir | — | — |
| Chao David Tsung-Hung | Dir | — | — |
| Ederington L. Benjamin | EVP, Legal, External Affairs | — | — |
Transactions 348
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-02-20 | 2025-02-18 | WLK | Chao John Tsung-chen | Dir | M - OptEx | $0.00 | +513 | 6,709 | +8% | $0 |
| D | 2025-02-19 | 2025-02-14 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | M - OptEx | $0.00 | +3,039 | 15.1K | +25% | $0 |
| D | 2025-02-19 | 2025-02-18 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | F - Tax | $115.29 | -790 | 14.3K | -5% | -$91.1K |
| D | 2025-02-19 | 2025-02-14 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | M - OptEx | $0.00 | +7,597 | 65.9K | +13% | $0 |
| D | 2025-02-19 | 2025-02-18 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | F - Tax | $115.29 | -1,895 | 64.0K | -3% | -$218.5K |
| 2024-12-02 | 2024-11-29 | WLK | Chao David Tsung-Hung | Dir | S - Sale | $129.08 | -1,750 | 7,784 | -18% | -$225.9K | |
| 2024-11-25 | 2024-11-22 | WLK | Chao David Tsung-Hung | Dir | S - Sale | $130.00 | -1,750 | 9,534 | -16% | -$227.5K | |
| 2024-09-03 | 2024-08-30 | WLK | Chao James | Senior COB, Dir | G - Gift | $0.00 | -6,642 | 38.6K | -15% | $0 | |
| DM | 2024-08-26 | 2024-08-23 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | M - OptEx | $75.51 | +14.9K | 22.9K | +185% | +$1.12M |
| D | 2024-08-26 | 2024-08-23 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | D - Sale to Iss | $149.48 | -14.9K | 12.1K | -55% | -$2.22M |
| DM | 2024-08-19 | 2024-08-16 | WLK | Chao Albert | Executive COB, Dir | D - Sale to Iss | $146.61 | -45.3K | 554.9K | -8% | -$6.64M |
| D | 2024-08-19 | 2024-08-16 | WLK | Chao Albert | Executive COB, Dir | M - OptEx | $68.09 | +45.3K | 600.2K | +8% | +$3.08M |
| D | 2024-08-15 | 2024-08-14 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | F - Tax | $145.44 | -2,772 | 21.9K | -11% | -$403.2K |
| D | 2024-08-15 | 2024-08-13 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | M - OptEx | $0.00 | +7,051 | 24.7K | +40% | $0 |
| D | 2024-08-15 | 2024-08-14 | WLK | Bender Mark Steven | EVP, CFO | F - Tax | $145.44 | -1,156 | 42.1K | -3% | -$168.1K |
| D | 2024-08-15 | 2024-08-13 | WLK | Bender Mark Steven | EVP, CFO | M - OptEx | $0.00 | +2,938 | 43.3K | +7% | $0 |
| D | 2024-08-15 | 2024-08-14 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | F - Tax | $145.44 | -1,156 | 58.3K | -2% | -$168.1K |
| D | 2024-08-15 | 2024-08-13 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | M - OptEx | $0.00 | +2,938 | 59.4K | +5% | $0 |
| D | 2024-08-12 | 2024-08-11 | WLK | Haas Marius | Dir | M - OptEx | — | +1,136 | 11.6K | +11% | — |
| D | 2024-08-12 | 2024-08-11 | WLK | Lubel Kimberly S | Dir | M - OptEx | — | +1,136 | 10.5K | +12% | — |
| D | 2024-08-12 | 2024-08-11 | WLK | Sabat Carolyn Chao | Dir | M - OptEx | — | +1,136 | 2,452 | +86% | — |
| D | 2024-08-12 | 2024-08-11 | WLK | Chao Catherine T. | Dir | M - OptEx | — | +1,136 | 4,452 | +34% | — |
| D | 2024-08-12 | 2024-08-11 | WLK | NORTHCUTT R BRUCE | Dir | M - OptEx | — | +1,136 | 20.1K | +6% | — |
| D | 2024-08-12 | 2024-08-11 | WLK | Graff Michael J | Dir | M - OptEx | — | +1,136 | 20.0K | +6% | — |
| D | 2024-08-12 | 2024-08-11 | WLK | Chao David Tsung-Hung | Dir | M - OptEx | — | +1,136 | 11.3K | +11% | — |
| D | 2024-08-12 | 2024-08-11 | WLK | MCCOLLUM MARK A | Dir | M - OptEx | — | +1,136 | 8,528 | +15% | — |
| D | 2024-08-12 | 2024-08-11 | WLK | Sheets Jeffrey Wayne | Dir | M - OptEx | — | +1,136 | 11.6K | +11% | — |
| 2024-05-13 | 2024-05-09 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | S - Sale | $158.50 | -3,500 | 17.6K | -17% | -$554.8K | |
| D | 2024-05-13 | 2024-05-12 | WLK | Sabat Carolyn Chao | Dir | M - OptEx | — | +1,316 | 1,316 | New | — |
| D | 2024-05-13 | 2024-05-12 | WLK | Chao Catherine T. | Dir | M - OptEx | — | +1,316 | 3,316 | +66% | — |
| D | 2024-05-08 | 2024-05-07 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | M - OptEx | $122.65 | +3,133 | 24.3K | +15% | +$384.3K |
| D | 2024-05-08 | 2024-05-07 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | D - Sale to Iss | $157.50 | -3,133 | 21.1K | -13% | -$493.4K |
| 2024-05-06 | 2024-05-03 | WLK | Bender Mark Steven | EVP, CFO | S - Sale | $152.19 | -4,950 | 40.4K | -11% | -$753.3K | |
| 2024-04-01 | 2024-03-28 | WLK | Chao James | COB, Dir | G - Gift | $0.00 | -36.6K | 45.2K | -45% | $0 | |
| DM | 2024-03-22 | 2024-03-21 | WLK | Zoeller Johnathan Stevan | VP, CAO | M - OptEx | $100.00 | +657 | 4,709 | +16% | +$65.7K |
| D | 2024-03-22 | 2024-03-21 | WLK | Zoeller Johnathan Stevan | VP, CAO | D - Sale to Iss | $150.57 | -657 | 4,416 | -13% | -$98.9K |
| 2024-03-18 | 2024-03-15 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | S - Sale | $144.50 | -3,878 | 21.1K | -15% | -$560.4K | |
| 2024-03-14 | 2024-03-13 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | S - Sale | $144.50 | -122 | 25.0K | -0.5% | -$17.6K | |
| D | 2024-03-11 | 2024-03-08 | WLK | Zoeller Johnathan Stevan | VP, CAO | D - Sale to Iss | $142.09 | -2,776 | 4,416 | -39% | -$394.4K |
| DM | 2024-03-11 | 2024-03-08 | WLK | Zoeller Johnathan Stevan | VP, CAO | M - OptEx | $105.93 | +2,776 | 5,135 | +118% | +$294.1K |
| D | 2024-03-11 | 2024-03-07 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | D - Sale to Iss | $142.55 | -12.7K | 25.1K | -34% | -$1.81M |
| DM | 2024-03-11 | 2024-03-07 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | M - OptEx | $99.60 | +12.7K | 30.1K | +72% | +$1.26M |
| 2024-03-07 | 2024-03-06 | WLK | Bender Mark Steven | EVP, CFO | S - Sale | $141.02 | -4,804 | 45.3K | -10% | -$677.5K | |
| 2024-02-28 | 2024-02-26 | WLK | Bender Mark Steven | EVP, CFO | S - Sale | $137.57 | -4,854 | 50.1K | -9% | -$667.8K | |
| DM | 2024-02-21 | 2024-02-20 | WLK | Chao James | COB, Dir | F - Tax | $130.55 | -13.0K | 83.0K | -14% | -$1.69M |
| D | 2024-02-21 | 2024-02-19 | WLK | Chao James | COB, Dir | M - OptEx | $0.00 | +10.8K | 94.8K | +13% | $0 |
| D | 2024-02-21 | 2024-02-16 | WLK | Chao James | COB, Dir | A - Grant | $0.00 | +21.6K | 84.0K | +35% | $0 |
| DM | 2024-02-21 | 2024-02-20 | WLK | Chao Albert | Pres, CEO, Dir | F - Tax | $130.59 | -24.8K | 557.1K | -4% | -$3.24M |
| D | 2024-02-21 | 2024-02-19 | WLK | Chao Albert | Pres, CEO, Dir | M - OptEx | $0.00 | +19.8K | 579.7K | +4% | $0 |
| D | 2024-02-21 | 2024-02-16 | WLK | Chao Albert | Pres, CEO, Dir | A - Grant | $0.00 | +39.7K | 559.9K | +8% | $0 |
| D | 2024-02-21 | 2024-02-16 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | A - Grant | $0.00 | +8,592 | 25.3K | +51% | $0 |
| D | 2024-02-21 | 2024-02-19 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | M - OptEx | $0.00 | +4,283 | 29.6K | +17% | $0 |
| DM | 2024-02-21 | 2024-02-20 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | F - Tax | $130.59 | -4,485 | 25.5K | -15% | -$585.7K |
| DM | 2024-02-21 | 2024-02-20 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | F - Tax | $130.70 | -984 | 12.1K | -8% | -$128.6K |
| D | 2024-02-21 | 2024-02-19 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | M - OptEx | $0.00 | +1,170 | 13.0K | +10% | $0 |
| D | 2024-02-21 | 2024-02-16 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | A - Grant | $0.00 | +2,346 | 11.9K | +25% | $0 |
| D | 2024-02-21 | 2024-02-16 | WLK | Bender Mark Steven | EVP, CFO | A - Grant | $0.00 | +11.2K | 55.5K | +25% | $0 |
| D | 2024-02-21 | 2024-02-19 | WLK | Bender Mark Steven | EVP, CFO | M - OptEx | $0.00 | +5,558 | 61.1K | +10% | $0 |
| DM | 2024-02-21 | 2024-02-20 | WLK | Bender Mark Steven | EVP, CFO | F - Tax | $130.70 | -6,144 | 55.0K | -10% | -$803.0K |
| D | 2024-02-21 | 2024-02-16 | WLK | Zoeller Johnathan Stevan | VP, CAO | A - Grant | $0.00 | +1,736 | 4,296 | +68% | $0 |
| DM | 2024-02-21 | 2024-02-20 | WLK | Zoeller Johnathan Stevan | VP, CAO | F - Tax | $130.67 | -746 | 4,483 | -14% | -$97.5K |
| D | 2024-02-21 | 2024-02-19 | WLK | Zoeller Johnathan Stevan | VP, CAO | M - OptEx | $0.00 | +866 | 5,162 | +20% | $0 |
| DM | 2024-02-21 | 2024-02-20 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | F - Tax | $130.58 | -4,618 | 56.5K | -8% | -$603.0K |
| D | 2024-02-21 | 2024-02-16 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | A - Grant | $0.00 | +8,802 | 56.7K | +18% | $0 |
| D | 2024-02-21 | 2024-02-19 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | M - OptEx | $0.00 | +4,388 | 61.1K | +8% | $0 |
| DM | 2023-12-01 | 2023-11-30 | WLK | Chao James | COB, Dir, 10% | M - OptEx | $78.93 | +68.2K | 130.6K | +109% | +$5.38M |
| DM | 2023-12-01 | 2023-11-30 | WLK | Chao James | COB, Dir, 10% | D - Sale to Iss | $128.49 | -68.2K | 73.4K | -48% | -$8.76M |
| 2023-11-17 | 2023-11-15 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | S - Sale | $130.50 | -4,215 | 16.8K | -20% | -$550.1K | |
| D | 2023-09-01 | 2023-08-31 | WLK | Chao James | COB, Dir, 10% | G - Gift | $0.00 | -58.3K | 62.4K | -48% | $0 |
| DM | 2023-09-01 | 2023-08-31 | WLK | Chao James | COB, Dir, 10% | D - Sale to Iss | $131.25 | -244.6K | 138.6K | -64% | -$32.10M |
| DM | 2023-09-01 | 2023-08-31 | WLK | Chao James | COB, Dir, 10% | M - OptEx | $69.90 | +244.6K | 168.2K | New | +$17.10M |
| I | 2023-09-01 | 2023-08-31 | WLK | Chao Catherine T. | Dir, 10% | G - Gift | $0.00 | +19.4K | 19.4K | New | $0 |
| I | 2023-09-01 | 2023-08-31 | WLK | Chao David Tsung-Hung | Dir, 10% | G - Gift | $0.00 | +19.4K | 19.4K | New | $0 |
| D | 2023-09-01 | 2023-08-31 | WLK | Chao Albert | Pres, CEO, Dir, 10% | M - OptEx | $63.98 | +20.0K | 540.1K | +4% | +$1.28M |
| DM | 2023-09-01 | 2023-08-31 | WLK | Chao Albert | Pres, CEO, Dir, 10% | D - Sale to Iss | $131.53 | -20.0K | 520.5K | -4% | -$2.63M |
| D | 2023-08-31 | 2023-08-30 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | D - Sale to Iss | $134.27 | -13.7K | 47.9K | -22% | -$1.84M |
| D | 2023-08-31 | 2023-08-30 | WLK | Ederington L. Benjamin | EVP, GC, CAO, PEM | M - OptEx | $61.87 | +13.7K | 61.6K | +29% | +$849.7K |
| D | 2023-08-31 | 2023-08-30 | WLK | Chao James | COB, Dir, 10% | D - Sale to Iss | $133.70 | -30.1K | 120.6K | -20% | -$4.02M |
| DM | 2023-08-31 | 2023-08-30 | WLK | Chao James | COB, Dir, 10% | M - OptEx | $54.12 | +30.1K | 150.7K | +25% | +$1.63M |
| D | 2023-08-31 | 2023-08-30 | WLK | Chao Albert | Pres, CEO, Dir, 10% | M - OptEx | $63.98 | +20.0K | 540.1K | +4% | +$1.28M |
| DM | 2023-08-31 | 2023-08-30 | WLK | Chao Albert | Pres, CEO, Dir, 10% | D - Sale to Iss | $134.15 | -20.0K | 520.15 | -97% | -$2.68M |
| D | 2023-08-31 | 2023-08-30 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | M - OptEx | $86.54 | +4,857 | 25.8K | +23% | +$420.3K |
| D | 2023-08-31 | 2023-08-30 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | D - Sale to Iss | $134.47 | -4,857 | 21.0K | -19% | -$653.1K |
| D | 2023-08-30 | 2023-08-29 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | M - OptEx | $65.81 | +8,100 | 29.1K | +39% | +$533.1K |
| D | 2023-08-30 | 2023-08-29 | WLK | Buesinger Robert F. | EVP, HIP, IT, Digital | D - Sale to Iss | $133.83 | -8,100 | 21.0K | -28% | -$1.08M |
| DM | 2023-08-30 | 2023-08-29 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | M - OptEx | $107.88 | +3,855 | 13.4K | +40% | +$415.9K |
| D | 2023-08-30 | 2023-08-29 | WLK | Janssens Thomas J. | SVP, Ops - PEM, Corp Logistic | D - Sale to Iss | $133.87 | -3,855 | 9,531 | -29% | -$516.1K |
| 2023-08-24 | 2023-08-23 | WLK | Chao David Tsung-Hung | Dir, 10% | S - Sale | $131.00 | -1,000 | 10.1K | -9% | -$131.0K | |
| D | 2023-08-15 | 2023-08-13 | WLK | Zoeller Johnathan Stevan | VP, CAO | M - OptEx | — | +588 | 2,704 | +28% | — |
| D | 2023-08-15 | 2023-08-14 | WLK | Zoeller Johnathan Stevan | VP, CAO | F - Tax | $132.11 | -144 | 2,560 | -5% | -$19.0K |
| D | 2023-08-14 | 2023-08-12 | WLK | Sheets Jeffrey Wayne | Dir | M - OptEx | — | +1,446 | 10.5K | +16% | — |
| D | 2023-08-14 | 2023-08-12 | WLK | MCCOLLUM MARK A | Dir | M - OptEx | — | +1,446 | 7,392 | +24% | — |
| D | 2023-08-14 | 2023-08-12 | WLK | Graff Michael J | Dir | M - OptEx | — | +1,446 | 18.9K | +8% | — |
| D | 2023-08-14 | 2023-08-12 | WLK | Lubel Kimberly S | Dir | M - OptEx | — | +1,446 | 9,389 | +18% | — |
| D | 2023-08-14 | 2023-08-12 | WLK | Haas Marius | Dir | M - OptEx | — | +1,446 | 10.5K | +16% | — |
| D | 2023-08-14 | 2023-08-12 | WLK | Chao David Tsung-Hung | Dir, 10% | M - OptEx | — | +1,446 | 11.1K | +15% | — |
| D | 2023-08-14 | 2023-08-12 | WLK | NORTHCUTT R BRUCE | Dir | M - OptEx | — | +1,446 | 18.9K | +8% | — |
| DM | 2023-08-09 | 2023-08-07 | WLK | Bender Mark Steven | EVP, CFO | D - Sale to Iss | $133.43 | -24.6K | 66.6K | -27% | -$3.29M |
| DM | 2023-08-09 | 2023-08-07 | WLK | Bender Mark Steven | EVP, CFO | M - OptEx | $96.90 | +24.6K | 69.0K | +55% | +$2.39M |
| D | 2023-05-22 | 2023-05-19 | WLK | Zoeller Johnathan Stevan | VP, CAO | D - Sale to Iss | $116.66 | -1,963 | 2,116 | -48% | -$229.0K |
Purchase Sale Sale after option exercise All abbreviations